A261318 - OEIS

A261318 as a simple table

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	1
6	0
7	0
8	3
9	1
10	0
11	1
12	10
13	8
14	1
15	0
16	0
17	30
18	50
19	15
20	1
21	0
22	1
23	91
24	280
25	155
26	24
27	1
28	0
29	0
30	273
31	1491
32	1365
33	371
34	35
35	1
36	0
37	1
38	820
39	7728
40	11046
41	4704
42	756
43	48
44	1
45	0
46	0
47	2460
48	39460
49	85050
50	53382
51	13020
52	1380
53	63
54	1

[1,0,0,0,1,1,0,0,3,1,0,1,10,8,1,0,0,30,50,15,1,0, 1,91,280,155,24,1,0,0,273,1491,1365,371,35,1,0,1, 820,7728,11046,4704,756,48,1,0,0,2460,39460,85050, 53382,13020,1380,63,1]